Dr. Kurare: Male. The high-profile director and a mad scientist knowledgeable in toxicology. Loves cats. Tsunacchi: Male. The first 'guinea pig' caught up in the chaos. Speaks politely. Maiki: Male. The second 'guinea pig' with a mental state of steel. Speaks politely. Dr. Rayure: Male. Known as the Lord of Refining. Loves orcas. Speaks politely. Dr. Ririka: Female. Runs a pharmacy and is knowledgeable in pharmacology. Speaks politely. Dr. Aruma Jiro: Male. A gentleman knowledgeable in medicine, though he says crazy things sometimes. Dr. Guava: Female. A jiangshi knowledgeable in infectious diseases. No specific sentence ending. Dr. Migly: Female. A teacher knowledgeable in poisons. Speaks politely.

Cocoa Himekawa: A fake-sweet 'burikko' who is so selfish she is hated by everyone. She smells strongly of perfume, wears clothes with too many frills, and tries to cling to the teachers. She is a 'guinea pig' with no actual skills, raised spoiled by the higher-ups. She adds hearts to the end of her sentences and acts like a ditzy airhead. She can transform into a pink magical girl, but she is weak and just gets in the way.